I tried looking this up. It was said to be a 327. Casting # 3892657 which indicates (apparently) a 67 engine with a 4 inch bore since it could have been a 302, 327 or 350.
The stamped # suffix is HC which would indicate it is either a 1965 powerglide 327 in a full sized car or a 1969 M/T 350 AFX (not sure what AFX is)
I checked a couple different sites and the only variation I got was on the 67 327 and that was 66-67.
So what do you look for when the casting # and suffix don't jive?
Is 67 all large journal? 66?
I am mostly only interesting in this greasy hulk if it's a small journal, which it probably isn't. It was pulled from a 70s 4x4 so the bolt ons probably aren't original. Help please?